Hello, how do you do? Go ahead and shake hands with Jianhui the monkey,
who controls a robotic hand through sensors implanted in its brain:

Zheng Xiaoxiang of the Brain-Computer Interface Research Team at
Zhejiang University in Zijingang, China, and colleagues announced earlier
this week that they had succeeded in capturing and deciphering the signals
from the monkey's brain and interpreting them into the real-time robotic
finger movements.

The two sensors implanted in Jianhui's brain monitor just 200 neurons
in his motor cortex, Zheng says. However, this was enough to accurately
interpret the monkey's movements and control the robotic hand.